Archive for the ‘E is for Electromagnetic’ Category

Quantum Teleportation

Thursday, June 10th, 2010

Photo via flickr by flash200

Scientists in China have succeeded in teleporting information between photons further than ever before—over a free space distance of 16 km (10 miles), bringing us closer to transmitting information over long distances without the need for a traditional signal.

Quantum teleportation is not the same as the teleportation most of us know from science fiction, where an object (or person) in one place is “beamed up” to another place where a perfect copy is replicated. In quantum teleportation two photons or ions (for example) are entangled in such a way that when the quantum state of one is changed the state of the other also changes, as if the two were still connected. This enables quantum information to be teleported if one of the photons/ions is sent some distance away.

In the experiments, pairs of photons were entangled and then the higher-energy photon of the pair was sent through a free space channel 16 km long. The researchers, from the University of Science and Technology of China and Tsinghua University in Beijing, found that even at this distance the photon at the receiving end still responded to changes in state of the photon remaining behind.

The distance of 16 km is greater than the effective aerosphere thickness of 5-10 km, so the group’s success could pave the way for experiments between a ground station and a satellite. This means quantum communication applications could be possible on a global scale in the near future.

The public free space channel was at ground level and spanned the 16 km distance between Badaling in Beijing (the teleportation site) and the receiver site at Huailai in Hebei province. Entangled photon pairs were generated at the teleportation site using a semiconductor, a blue laser beam, and a crystal of beta-barium borate (BBO). The research team designed two types of telescopes to serve as optical transmitting and receiving antennas.

The experiments confirm the feasibility of space-based quantum teleportation, and represent a giant leap forward in the development of quantum communication applications.

via PhysOrg

Magnetic Fields in Motion

Wednesday, November 11th, 2009

Photo via Magnetic Movie by Ruth Jarman and Joe Gerhardt

In Magnetic Movie, the secret lives of invisible magnetic fields are revealed as chaotic ever-changing geometries. All action takes place around NASA’s Space Sciences Laboratories, UC Berkeley, to recordings of space scientists describing their discoveries. Actual VLF audio recordings control the evolution of the fields as they delve into our inaudible surroundings, revealing recurrent ‘whistlers’ produced by fleeting electrons.

Ruth Jarman and Joe Gerhardt of Semiconductor, artists-in-residence at the Space Sciences Laboratory, have taken the magnificent scientific visualizations of the sun and solar winds conducted at the Space Sciences Laboratory and “semiconducted” them.

With Magnetic Movie, the artists have tapped into a new and ancient aesthetic of turbulence. We can hear it in the sounds of natural radio— naturally-occurring electromagnetic signals from the earth’s ionosphere and magnetosphere— that course through Magnetic Movie.

Are we observing a series of scientific experiments, the universe in flux, or a documentary of a fictional world?

Magnetic Movie from Semiconductor on Vimeo.

E is for Electromagnetic

Saturday, May 9th, 2009

If you are familiar with the work of Nikola Tesla, you’ll know we are surrounded by natural electromagnetic frequencies. Although previous theories suggested that small changes in electromagnetic fields had no effect, scientists now know that electromagnetic frequencies in microgravity cause the human body and cell cultures to respond differently. Here on Earth, holistic practitioners are now investigating if artificial man-made electromagnetic fields, ranging from appliances like microwaves to high-tension power lines and mobile phones, can cause interference with biological processes, suggesting that this electro-pollution is triggering stress, disease, and even, DNA breakage. One particular area of investigation are Schumann resonances. Schumann resonances are the electromagnetic waves that are excited by lightening and occur in the ionized plasma contained inside the cavity formed between the Earth’s surface and the outer boundary of the ionosphere. Although always fluctuating, one of the fundamental frequencies of SR is the standing wave of 7.8 hertz. Since some reports state that at noon time, on all parts of the Earth, SR frequencies have the highest activities, researchers have sought for decades to develop a correlation between SR and Alpha brain rhythms (7-12 Hz) suggesting that when our brains are in Alpha state during dreaming and deep relaxation, we are in resonant feedback with the Earth and our well-being is energized. Due to the recent hysteria over the Mayan prediction of 2012, investigation into SR has exploded, with some researchers suggesting that this primary frequency of 7.8 Hz is rising, and will reach 13 Hz at 11:11 UTC on December 21, 2012, the end of the Mayan calendar and the date of the Winter Solstice when the sun is predicted to cross the Galactic Center of the Milky Way. Conspiracy theorists also suggest that this frequency rise will be joined by killer solar flares causing the Earth’s magnetic field to collapse, the Earth’s core to stop rotating, cataclysmic end-of-the-world events to occur, and our minds to vanish. Rather than doomsday, others believe that this frequency increase of Earth’s “heart beat” is affecting the biorhythm of our hearts, and will mark the “great awakening” where all of humanity experiences an elevated level of consciousness. Considering that many believe HAARP can modify the world’s electromagnetic field, enabling them to engineer the weather and zap people’s brain waves to manipulate our state of mind, let’s everyone hope that all we’re destined to experience is nothing more than good vibes.